|
||||||
|---|---|---|---|---|---|---|
| Home | 29 CFR | 40 CFR | 49 CFR | Federal Register | MSDS Search | Purchase CFR e-Books |
§131.37 California.
(a) Additional criteria. The following criteria are applicable to waters specified in the Water Quality Control Plan for Salinity for the San Francisco Bay/Sacramento-San Joaquin Delta Estuary, adopted by the California State Water Resources Control Board in State Board Resolution No. 91-34 on May 1, 1991:
(1) Estuarine habitat criteria. (i) General rule. (A) Salinity
(measured at the surface) shall not exceed 2640 micromhos/centimeter specific
conductance at 25 °C (measured as a 14-day moving average) at the Confluence of
the Sacramento and San Joaquin Rivers throughout the period each year from
February 1 through June 30, and shall not exceed 2640 micromhos/centimeter
specific conductance at 25 °C (measured as a 14-day moving average) at the
specific locations noted in Table 1 near Roe Island and Chipps Island for the
number of days each month in the February 1 to June 30 period computed by
reference to the following formula: Number of days required in Month X = Total number of days in Month×* (1 −
1/(1+eK) where K = A + (B*natural logarithm of the previous month's 8-River Index);
A and B are determined by reference to Table 1 for the Roe Island and Chipps
Island locations;
x is the calendar month in the February 1 to June 30 period;
and e is the base of the natural (or Napierian) logarithm. Where the number of days computed in this equation in paragraph (a)(1)(i)(A)
of this section shall be rounded to the nearest whole number of days. When the
previous month's 8-River Index is less than 500,000 acre-feet, the number of
days required for the current month shall be zero. (B) The Roe Island criteria apply at the salinity measuring station
maintained by the U.S. Bureau of Reclamation at Port Chicago (km 64). The Chipps
Island criteria apply at the Mallard Slough Monitoring Site, Station D-10 (RKI
RSAC-075) maintained by the California Department of Water Resources. The
Confluence criteria apply at the Collinsville Continuous Monitoring Station C-2
(RKI RSAC-081) maintained by the California Department of Water Resources.
(ii) Exception. The criteria at Roe Island shall be required for any
given month only if the 14-day moving average salinity at Roe Island falls below
2640 micromhos/centimeter specific conductance on any of the last 14 days of the
previous month.
(2) Fish migration criteria. (i) General rule.
(A) Sacramento River. Measured Fish Migration criteria values for the
Sacramento River shall be at least the following: At temperatures less than below 61 °F: SRFMC = 1.35
At temperatures between 61 °F and 72 °F: SRFMC = 6.96-.092 * Fahrenheit
temperature
At temperatures greater than 72 °F: SRFMC = 0.34 where SRFMC is the Sacramento River Fish Migration criteria value.
Temperature shall be the water temperature at release of tagged salmon smolts
into the Sacramento River at Miller Park.
(B) San Joaquin River. Measured Fish Migration criteria values on the
San Joaquin River shall be at least the following: For years in which the SJVIndex is >2.5: SJFMC = (−0.012) + 0.184*SJVIndex
In other years: SJFMC = 0.205 + 0.0975*SJVIndex where SJFMC is the San Joaquin River Fish Migration criteria value, and
SJVIndex is the San Joaquin Valley Index in million acre feet (MAF)
(ii) Computing fish migration criteria values for Sacramento River. In
order to assess fish migration criteria values for the Sacramento River, tagged
fall-run salmon smolts will be released into the Sacramento River at Miller Park
and captured at Chipps Island, or alternatively released at Miller Park and Port
Chicago and recovered from the ocean fishery, using the methodology described in
this paragraph (a)(2)(ii). An alternative methodology for computing fish
migration criteria values can be used so long as the revised methodology is
calibrated with the methodology described in this paragraph (a)(2)(ii) so as to
maintain the validity of the relative index values. Sufficient releases shall be
made each year to provide a statistically reliable verification of compliance
with the criteria. These criteria will be considered attained when the sum of
the differences between the measured experimental value and the stated criteria
value (i.e., measured value minus stated value) for each experimental release
conducted over a three year period (the current year and the previous two years)
shall be greater than or equal to zero. Fish for release are to be tagged at the
hatchery with coded-wire tags, and fin clipped. Approximately 50,000 to 100,000
fish of smolt size (size greater than 75 mm) are released for each survival
index estimate, depending on expected mortality. As a control for the ocean
recovery survival index, one or two groups per season are released at Benecia or
Pt. Chicago. From each upstream release of tagged fish, fish are to be caught
over a period of one to two weeks at Chipps Island. Daylight sampling at Chipps
Island with a 9.1 by 7.9 m, 3.2 mm cod end, midwater trawl is begun 2 to 3 days
after release. When the first fish is caught, full-time trawling 7 days a week
should begin. Each day's trawling consists of ten 20 minute tows generally made
against the current, and distributed equally across the channel.
(A) The Chipps Island smolt survival index is calculated as: SSI=R÷MT(0.007692) where R=number of recaptures of tagged fish
M=number of marked (tagged) fish released
T=proportion of time sampled vs total time tagged fish were passing the site
(i.e. time between first and last tagged fish recovery) Where the value 0.007692 is the proportion of the channel width fished by the
trawl, and is calculated as trawl width/channel width.
(B) Recoveries of tagged fish from the ocean salmon fishery two to four years
after release are also used to calculate a survival index for each release.
Smolt survival indices from ocean recoveries are calculated as: OSI=R where R M R M (1) The number of tagged adults recovered from the ocean fishery is
provided by the Pacific States Marine Fisheries Commission, which maintains a
port sampling program.
(2) [Reserved]
(iii) Computing fish migration criteria values for San Joaquin River.
In order to assess annual fish migration criteria values for the San Joaquin
River, tagged salmon smolts will be released into the San Joaquin River at
Mossdale and captured at Chipps Island, or alternatively released at Mossdale
and Port Chicago and recovered from the ocean fishery, using the methodology
described in paragraph (a)(2)(iii). An alternative methodology for computing
fish migration criteria values can be used so long as the revised methodology is
calibrated with the methodology described below so as to maintain the validity
of the relative index values. Sufficient releases shall be made each year to
provide a statistically reliable estimate of the SJFMC for the year. These
criteria will be considered attained when the sum of the differences between the
measured experimental value and the stated criteria value (i.e., measured value
minus stated value) for each experimental release conducted over a three year
period (the current year and the previous two years) shall be greater than or
equal to zero.
(A) Fish for release are to be tagged at the hatchery with coded-wire tags,
and fin clipped. Approximately 50,000 to 100,000 fish of smolt size (size
greater than 75 mm) are released for each survival index estimate, depending on
expected mortality. As a control for the ocean recovery survival index, one or
two groups per season are released at Benicia or Pt. Chicago. From each upstream
release of tagged fish, fish are to be caught over a period of one to two weeks
at Chipps Island. Daylight sampling at Chipps Island with a 9.1 by 7.9 m, 3.2 mm
cod end, midwater trawl is begun 2 to 3 days after release. When the first fish
is caught, full-time trawling 7 days a week should begin. Each day's trawling
consists of ten 20 minute tows generally made against the current, and
distributed equally across the channel.
(B) The Chipps Island smolt survival index is calculated as: SSI=R÷MT(0.007692) where R=number of recaptures of tagged fish
M=number of marked (tagged) fish released
T=proportion of time sampled vs total time tagged fish were passing the site
(i.e. time between first and last tagged fish recovery) Where the value 0.007692 is the proportion of the channel width fished by the
trawl, and is calculated as trawl width/channel width.
(C) Recoveries of tagged fish from the ocean salmon fishery two to four years
after release are also used to calculate a survival index for each release.
Smolt survival indices from ocean recoveries are calculated as: OSI=R where R M R M (1) The number of tagged adults recovered from the ocean fishery is
provided by the Pacific States Marine Fisheries Commission, which maintains a
port sampling program.
(2) [Reserved]
(3) Suisun marsh criteria. (i) Water quality conditions sufficient to
support a natural gradient in species composition and wildlife habitat
characteristic of a brackish marsh throughout all elevations of the tidal
marshes bordering Suisun Bay shall be maintained. Water quality conditions shall
be maintained so that none of the following occurs: Loss of diversity;
conversion of brackish marsh to salt marsh; for animals, decreased population
abundance of those species vulnerable to increased mortality and loss of habitat
from increased water salinity; or for plants, significant reduction in stature
or percent cover from increased water or soil salinity or other water quality
parameters.
(ii) [Reserved]
(b) Revised criteria. The following criteria are applicable to state
waters specified in Table 1-1, at Section (C)(3) ("Striped Bass -- Salinity : 3.
Prisoners Point -- Spawning) of the Water Quality Control Plan for Salinity for
the San Francisco Bay -- Sacramento/San Joaquin Delta Estuary, adopted by the
California State Water Resources Control Board in State Board Resolution No.
91-34 on May 1, 1991: (c) Definitions. Terms used in paragraphs (a) and (b) of this section,
shall be defined as follows:
(1) Water year. A water year is the twelve calendar months beginning
October 1.
(2) 8-River Index. The flow determinations are made and are published
by the California Department of Water Resources in Bulletin 120. The 8-River
Index shall be computed as the sum of flows at the following stations:
(i) Sacramento River at Band Bridge, near Red Bluff;
(ii) Feather River, total inflow to Oroville Reservoir;
(iii) Yuba River at Smartville;
(iv) American River, total inflow to Folsom Reservoir;
(v) Stanislaus River, total inflow to New Melones Reservoir;
(vi) Tuolumne River, total inflow to Don Pedro Reservoir;
(vii) Merced River, total inflow to Exchequer Reservoir; and
(viii) San Joaquin River, total inflow to Millerton Lake.
(3) San Joaquin Valley Index. (i) The San Joaquin Valley Index is
computed according to the following formula: I where I X=Current year's April-July San Joaquin Valley unimpaired runoff
Y=Current year's October-March San Joaquin Valley unimpaired runoff
Z=Previous year's index in MAF, not to exceed 0.9 MAF (ii) Measuring San Joaquin Valley unimpaired runoff. San Joaquin
Valley unimpaired runoff for the current water year is a forecast of the sum of
the following locations: Stanislaus River, total flow to New Melones Reservoir;
Tuolumne River, total inflow to Don Pedro Reservoir; Merced River, total flow to
Exchequer Reservoir; San Joaquin River, total inflow to Millerton Lake.
(4) Salinity. Salinity is the total concentration of dissolved ions in
water. It shall be measured by specific conductance in accordance with the
procedures set forth in 40 CFR 136.3, Table 1B, Parameter 64.
[60 FR 4707, Jan. 24, 1995]
Table 1. Constants applicable to each of the monthly equations to determine monthly requirements described.
----------------------------------------------------------------------------------------------------------------
Chipps Island Roe Island (if triggered)
Month X ---------------------------------------------------------------
A B A B
----------------------------------------------------------------------------------------------------------------
Feb............................................. -\1\ -\1\ -14.36 +2.068
Mar............................................. -105.16 +15.943 -20.79 +2.741
Apr............................................. -47.17 +6.441 -28.73 +3.783
May............................................. -94.93 +13.662 -54.22 +6.571
June............................................ -81.00 +9.961 -92.584 +10.699
----------------------------------------------------------------------------------------------------------------
\1\ Coefficients for A and B are not provided at Chipps Island for February, because the 2640 micromhos/cm
specific conductance criteria must be maintained at Chipps Island throughout February under all historical 8-
River Index values for January.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Sampling site Nos (I-- San Joaquin
Location A/RKI) Parameter Description Index type Valley Index Dates Values
--------------------------------------------------------------------------------------------------------------------------------------------------------
San Joaquin River at Jersey D15/RSAN018, Specific....... 14-day running Not Applicable. >2.5 MAF April 1 to May 0.44 micro-
Point, San Andreas Landing, C4/RSAN032, Conductance.... average of 31. mhos.
Prisoners Point, Buckley D29/RSAN038, @ 25 °C... mean daily for
Cove, Rough and Ready P8/RSAN056, the period not
Island, Brandt Bridge, -/RSAN062, more than
Mossdale, and Vernalis. C6/RSAN073, value shown,
C7/RSAN087, in mmhos.
C10/RSAN112
San Joaquin River at Jersey D15/RSAN018, Specific 14-day running Not Applicable. [le]2.5 MAF April 1 to May 0.44 micro-
Point, San Andreas Landing C4/RSAN032, Conductance. average of 31. mhos.
and Prisoners Point. D29/RSAN038 mean daily for
the period not
more than
value shown,
in mmhos.
--------------------------------------------------------------------------------------------------------------------------------------------------------
